public void Set_AddsNewQueryParameter()
        {
            const string path = "/6/7/8";

            var routeValues     = new AspNetCore.Routing.RouteValueDictionary();
            var templateMatcher = new TemplateMatcher(TemplateParser.Parse("/{a}/{b}/{c}"), new AspNetCore.Routing.RouteValueDictionary());

            templateMatcher.TryMatch(path, routeValues);

            var httpContext = new DefaultHttpContext();

            httpContext.Request.RouteValues = routeValues;
            var context = new RequestTransformContext()
            {
                Path        = path,
                Query       = new QueryTransformContext(httpContext.Request),
                HttpContext = httpContext
            };
            var transform = new QueryParameterRouteTransform(QueryStringTransformMode.Set, "z", "a");

            transform.ApplyAsync(context);
            Assert.Equal("?z=6", context.Query.QueryString.Value);
        }
        public async Task Append_AddsQueryParameterWithRouteValue(string pattern, string routeValueKey, string expected)
        {
            const string path = "/6/7/8";

            var routeValues     = new AspNetCore.Routing.RouteValueDictionary();
            var templateMatcher = new TemplateMatcher(TemplateParser.Parse(pattern), new AspNetCore.Routing.RouteValueDictionary());

            templateMatcher.TryMatch(path, routeValues);

            var httpContext = new DefaultHttpContext();

            httpContext.Request.RouteValues = routeValues;
            var context = new RequestTransformContext()
            {
                Path        = path,
                Query       = new QueryTransformContext(httpContext.Request),
                HttpContext = httpContext
            };
            var transform = new QueryParameterRouteTransform(QueryStringTransformMode.Append, "z", routeValueKey);
            await transform.ApplyAsync(context);

            Assert.Equal(expected, context.Query.QueryString.Value);
        }